JPS5718170A - Data synchronizing circuit of video control signal - Google Patents

Data synchronizing circuit of video control signal

Info

Publication number
JPS5718170A
JPS5718170A JP9360180A JP9360180A JPS5718170A JP S5718170 A JPS5718170 A JP S5718170A JP 9360180 A JP9360180 A JP 9360180A JP 9360180 A JP9360180 A JP 9360180A JP S5718170 A JPS5718170 A JP S5718170A
Authority
JP
Japan
Prior art keywords
data
latched
memory
latch
control data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9360180A
Other languages
Japanese (ja)
Inventor
Akihiko Minami
Hideji Hirakawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP9360180A priority Critical patent/JPS5718170A/en
Publication of JPS5718170A publication Critical patent/JPS5718170A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Synchronizing For Television (AREA)
  • Studio Circuits (AREA)

Abstract

PURPOSE:To obtain a data synchronizing circuit which is able to generate a key signal causing no deviation from a video data, by storing a control data, and reading out this data when television of its field is actually used. CONSTITUTION:A control data is latched by a latch group A or a latch group B in a vertical blanking period of write to a video memory, and the control data is latched alternately by two latch groups A,B in every field. Its changeover is executed by the timing by which a write start pulse is led in an FF 5, that is to say, the timing for starting to write a video data in a memory. Subsequently, the control data which has been latched by the latch groups A,B is used by the timing for starting to read the video data from the memory. Selection of the latch groups A,B in this case is decided by taking negative logic of the FF 5. That is to say, if its negative logic is taken, it results in selection of a latch group which has been latched previously, and it becomes a data corresponding to televison which is read out from the memory.
JP9360180A 1980-07-09 1980-07-09 Data synchronizing circuit of video control signal Pending JPS5718170A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9360180A JPS5718170A (en) 1980-07-09 1980-07-09 Data synchronizing circuit of video control signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9360180A JPS5718170A (en) 1980-07-09 1980-07-09 Data synchronizing circuit of video control signal

Publications (1)

Publication Number Publication Date
JPS5718170A true JPS5718170A (en) 1982-01-29

Family

ID=14086834

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9360180A Pending JPS5718170A (en) 1980-07-09 1980-07-09 Data synchronizing circuit of video control signal

Country Status (1)

Country Link
JP (1) JPS5718170A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59142573A (en) * 1983-02-03 1984-08-15 Canon Inc Image forming device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59142573A (en) * 1983-02-03 1984-08-15 Canon Inc Image forming device
JPH0610722B2 (en) * 1983-02-03 1994-02-09 キヤノン株式会社 Reader printer

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